Question

aflati x si y daca
4 x patrat+2 y patrat +4xy=2y-1

Answer 1

4x²+2y² +4xy=2y-1

4x²+4xy+y²+ y²-2y+1=0

(2x+y)²+(y-1)²=0

=> 2x+y=0 si y-1=0

=> y=1

2x+1=0 => x=-1/2

=> x=-1/2 si y=1